What beautiful colors! I am working on a hexagon quilt top now that is in the diamond shapes. Just need to do the half diamonds for the edges. I'm not aware of a name for it, but am leaning towards Tartan's idea, GFG variation. What size are the hexagons? And are they english paper pieced? Your's looks like springtime! Lucky find. My quilt will be a wedding gift for the next Grand to marry, and I am naming it "Diamonds are Forever"